While garnets can (and should!) be worn in any season, they are notably the Birthstone for January. The deep winter whites of snow are often offset with the brilliance of their deep, robust red.
 
As January's semi-precious birthstone, Garnet is thought to keep the wearer safe during travel. It's often fiery hue and dimensional quality (esp. when faceted) gives it spiritual warmth as the stone of strenght, safety, and self-empowerment. 
 
Dimensions:
Garnet, 5mm
Drop, 1 1/8 inches